The daily game on Priors
Fermi of the day
One number a day: a best guess and a range you're 80% sure of.
How it works
- Give your best guess, and a low and high you're 80% sure the answer sits between.
- One shot a day. Close guesses and honest ranges score most; a miss outside your range costs the most.
One question a day, the same for everyone. Trains: honest estimates and calibrated ranges. Free, no sign-up.
More on Priors
Quick games for anyone who likes numbers, 60-second skill games, scheduled contests and 100 probability puzzles. See all the games or try a puzzle.